A Novel Array Arrangement and Feeding Mode to Enhance the Performance of the Halved Volume Dual-polarized Dipole Antenna

摘要

A dual polarized antenna which occupies one-half the volume of the traditional crossed dipole antenna is developed in this paper. It serves as the basic array element, and is composed of two back-to-back folded dipoles. For each dipole, a portion of its feeding line and one dipole arm are set along the vertical direction, while the reminder portion of the feeding line and the other dipole arm are set along the horizontal direction. The orthogonal currents on the two arms of the dipole could synthesize the slant currents, thus generating ±45° polarization. The proposed antenna element is designed to work at 3.4 to 3.6 GHz band with . Its longitudinal dimension is only 19 mm ( 0.22 λ0, where λ0 represents the free-space wavelength at 3.5 GHz), about half of the traditional crossed dipole. Then, a subarray which adopts four sequentially rotated elements and appropriate phase assignment is investigated. The performance of the proposed array is better than that of the regular array. The sub-array can be a good candidate for Fifth Generation Massive Multiple Input Multiple Output (MIMO) antenna application.